#--*coding:utf-8*--
from tkinter import *
from tkinter import ttk
from tkinter import messagebox
import os
import json
import threading
import requests
from PIL import Image,ImageTk

'''
抖音無水印視頻下載工具
難點：1.視頻接口
 2.進度條
'''
def clean_progressbar():
 # 清空進度條
 fill_line = canvas.create_rectangle(1.5, 1.5, 0, 23, width=0, fill="white")
 x = 500 # 未知變量，可更改
 n = 600 / x # 465是矩形填充滿的次數
 for t in range(x):
 n = n + 600 / x
 # 以矩形的長度作為變量值更新
 canvas.coords(fill_line, (0, 0, n, 60))
 window.update()

def download():
 #先清空進度條，再下載
 clean_progressbar()
 real_link=t1.get('0.0',END).split('**')[-1]
 headers2 = {
 'sec-fetch-dest': 'document',
 'user-agent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Mobile Safari/537.36'
 }
 r2 = requests.get(real_link, headers=headers2, stream=True)
 try:
 os.mkdir(video_path)
 except:
 pass
 file =video_path+ video_title + '.mp4'
 #下載與進度條
 chunk_size = 1024 # 每一塊的大小，每次下載塊的大小
 file_size = int(r2.headers['Content-Length']) # 提取出來的文件大小為string格式，使用int()強制轉化
 fill_line = canvas.create_rectangle(1.5, 1.5, 0, 23, width=0, fill="green")
 raise_data = 600 / (file_size / chunk_size) # 增量大小，600為進度條的長度
 _size = 0 # 已經下載文件的大小
 with open(file, "wb") as f:
 n=0
 for data in r2.iter_content(chunk_size): # inter_content:用于邊下載邊存硬盤，每次下載chunk_size大小的塊
 f.write(data)
 n = n + raise_data
 canvas.coords(fill_line, (0, 0, n, 60))
 window.update()
 #下載完以后清空
 t1.delete('0.0',END)
 t1.insert(END,'{title}.mp4\n下載完成！'.format(title=video_title))

#解析出無水印視頻下載地址以及視頻標題
def parse(share_link):
 # 先處理短鏈接獲取item_ids
 headers = {
 'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
 'sec-fetch-dest': 'document',
 'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36'
 }
 # 使用allow_redirects=False禁止重定向，拿到重定向的url
 r1 = requests.get(share_link, allow_redirects=False, headers=headers)
 item_ids = re.findall(r'video/(\d+)/', r1.text)
 interface_url='https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids={}'.format(''.join(item_ids))
 r=requests.get(interface_url,headers=headers)
 _json=json.loads(r.text)
 try:
 item_list=_json.get('item_list')[0]
 video_title=item_list.get('desc')#視頻名稱
 watermark_video_link=item_list.get('video').get('play_addr').get('url_list')[0]#視頻帶水印地址
 real_video_link=watermark_video_link.replace('playwm','play')#視頻無水印地址
 return video_title,real_video_link
 except TypeError:
 messagebox.showerror('提示','請檢查輸入地址！')
 t1.delete('0.0',END)
 return '輸入地址有誤','請檢查！'

#調用jiexi()將視頻標題和下載鏈接顯示在Text Widget中
def pre_parse():
 share_link=e1.get()
 if len(share_link)!=0:
 global video_title, real_video_link
 try:
 video_title, real_video_link=parse(share_link)
 except TypeError:
 t1.insert(END,'輸入地址有誤，請檢查！')
 t1.delete('0.0',END)
 #去除標題中的表情以及符號，只保留漢字
 try:
 t1.insert(END, video_title + '\n' +'*'*30+ real_video_link)
 b2.config(state='normal')
 except TclError:
 filted_title=re.findall(r'[\u4E00-\u9FA5\s]+',video_title)
 t1.insert(END,''.join(filted_title)+'\n'+'*'*30+real_video_link)
 b2.config(state='normal')
 else:
 messagebox.showerror('錯誤','請輸入地址！')
 t1.delete('0.0',END)
 t1.insert(END,'請在上面輸入地址！')

#打開文件夾函數
def open_dir():
 try:
 os.mkdir(video_path)
 except:
 pass
 abs_path=os.path.abspath(video_path)
 os.startfile(abs_path)

#退出窗口函數
def quit_window():
 window.destroy()

#函數打包進線程
def thread_it(func,*args):
 t=threading.Thread(target=func,args=args)
 t.setDaemon(True)#先守護主線程
 t.start()#再啟動

if __name__ == '__main__':
 video_path='./video/'
 window=Tk()
 window.title('Downloader-v1.0')
 width=295
 height=380
 screenWidth = window.winfo_screenwidth() # 獲取顯示區(qū)域的寬度
 screenHeight = window.winfo_screenheight() # 獲取顯示區(qū)域的高度
 left = (screenWidth - width) / 2
 top = (screenHeight - height) / 2
 window.geometry("%dx%d+%d+%d" % (width, height, left, top))
 window.resizable(0,0)

 window.iconbitmap('./rely/my_favicon.ico')
 photo=Image.open('./rely/dy_logo.png')
 photo=photo.resize((200,50))
 image=ImageTk.PhotoImage(photo)
 l0=ttk.Label(window,imag=image,justify='center')
 l0.pack()
 f1=ttk.Labelframe(window,text='視頻鏈接地址：')
 f1.place(x=40,y=55)
 e1=ttk.Entry(f1,width=30)
 e1.pack()
 f2=ttk.Labelframe(window,text='信息：')
 f2.place(x=40,y=102)
 t1=Text(f2,height=6,width=30)
 t1.pack()
 t1.insert(END,'{_xing}\n將抖音分享鏈接地址粘貼在上面輸入框中，本程序會自動解析出視頻的下載地址并且顯示在這里\n{_xing}'.format(_xing='*'*29))
 b1=ttk.Button(window,text='解析',command=lambda :thread_it(pre_parse))
 b1.place(x=40,y=265)
 b2=ttk.Button(window,text='下載',state='disable',command=lambda :thread_it(download))
 b2.place(x=170,y=265)
 b3=ttk.Button(window,text='打開文件夾',command=open_dir)
 b3.place(x=40,y=298)
 b4=ttk.Button(window,text='退出',command=quit_window)
 b4.place(x=170,y=298)

 f3=ttk.Labelframe(window)
 f3.place(x=40,y=329)
 l1=ttk.Label(f3,text=' 敬告：本軟件僅供學習交流使用！',width=30,justify='center',foreground='red')
 l1.pack(fill=X)

 f4=ttk.LabelFrame(window,text='下載進度：')
 f4.place(x=40,y=210)
 canvas = Canvas(f4, width=210, height=20,bg="white")
 canvas.pack(side='left')

 l2_var=StringVar()
 l2=ttk.Label(f4,textvariable=l2_var,text='未下載')
 l2.pack(side='left',anchor=S)

 window.mainloop()
 '''
 test_url： https://v.douyin.com/JcxTMj2/
 '''